Seat structure



Nov. 5, 1929. G. H. HAMILTON ET Al.

S EAT STRUCTURE Filed Nov. 16l 1927 2 Sheets-Sheet NOV- 5L l929- G. H. HAMILTON ET A1. 1,734,576

SEAT STRUCTURE Filed Nov. 16, 1927 2 sheets-sheet 2 /uw m /u'w A TTORNEY INVENTORS:

Patented Nov. 5,', 1929 ,UNITED STATES PATENT oFFlcE GEORGE H. HAMILTON, OF GRAND RAPIDS, AND ROY A. WHITE, OF WALKER TOWN-4 SHIP, KENT COUNTY, MICHIGAN, ASSIGNORS TO AMERICAN SEATING COMPANY, F GRAND RAIIDS, MICHIGAN, A CORPORATION OF NIEVVy JERSEY SEAT STRUCTURE Original application led July Figure 2 is a side view of a portion of the means for adjusting the position of one ofr the leg rests;

Figure 3 is a sectional view thereof taken on line 3 3 of Figure 2;

Figure 4 is a transverse sectional view of portions of the same;

Figure 5 is a bottom plan view of said leg rest Figure 6 is a left-hand end view of a portion of the combined structure, showing a second leg rest; i

Figure 7 is a vertical sectional view of a portion of the same taken on line 7-7 of Fig ure 6; and f Figure 8 is a vertical sectional View of a portion of the seat illustrating the rotatable mounting thereof.

In the embodiment of the invention illustrated by said drawings, the combined seat and desk structure particularly adapted for use in schools has a seat 1 and desk 2 having f legs 3 and 4 respectively and connected by a horizontal member 5. Mounted in connec' tion with the seat 1 are a pair of rests for the upper portions of the legs of the occupant, each rest comprising a body portion 6'mounted at the forward edge of the seat, swingably on a horizontal aXis 7 This body portion 6 car ries a leg-supporting portion 8 slidable toward and away from the seat in a way 9 in said body portion, to adjusted positions in which said leg-supporting portion 8 may be releasably held by a threaded rod 10 carried by this leg-supporting portion and having a 50 wing nut 11 whose head 12 bears on the body Serial No, 233,554.-

portion 6 adjacent its slot 13 through which this rod extends. Means are provided for swinging in avertical plane and for releasably holding in swung positions this leg rest, suoli means as shown comprising a iXed member designated generally 14 carried by the seat and having an arcuate surface 15, and an arm member 16 mounted swingably concentrically with said arcuate surface and having a surface 18 inclined relatively thereto.y A clampo ing element, as the ballv 19 is adapted to be moved along and between said surfaces in the direction in which these surfaces approach each other to a position wherein said ball element wedgingly engages between said surfaces to clamp the members 14 and 16 against interrelative movement, said element 19 being pressed in said direction and to such position by a coiled spring 20. A link 21 is pivotally connected at 22 and 23 respectively to the swingable arm member 16 and the body portion 6 of said leg rest so that in the clamping position of the ball element 19 the leg rest is held in the swung position to which it may have been moved by said arm' member or otherwise. The element or ball 19 is released from its clamping action and moved against the pressure ofk spring 2O by an arm 24 swingably mounted concentrically with the arm member 16, and provided with a handle portion 25 and an inward projection 27 engaging the ball element 19. As shown, a pair of such arms 24, a pair of ball elements y19 and a pair of springs 2O abutting on an intermediate stop 26 are provided, so that the handle portions 25 of these arms 24 may be pressed by hand'toward each other thusreleasing both elements or balls 19 from their clamping action.

. By mounting the parts so that the arm member 16 is keyed at 28 on a shaft 29 rockable in a bearing 30 in member 14, and by mounting the arms y24 on ysaid shaft with a turning movement thereon limited as by means of the shafts projections 31 engaging one of the spaced sides of the axially-extending grooves 32 of the arms 24 (as seen in Figure 4), the arm member 16 and said leg rest may be swung 'by the arms 24 (in the released 100 position of the ball elements 19) to desired positions.

A second pair of rests (for the lower or ankle portions of the legs of the occupant) are shown, comprising a body portion 35 releasably held in adjusted vertical positions as by the set screw 36 threaded in the collar 37 of said body portion and engaging the upright 88 on Which the desk 2 is carried, each of said rests comprising also a leg support 39 having a convex bearing surface Ll0 turnable in a vertical plane on the concave bearing` surface ll of a lateral extension 5l of the body portion 35. A threaded bolt l2 extends through an ening in said extension 5l and through a slot le of the leg support 39 and arries a Lnt so that this bolt may be turned by its Wheel handle i6 to clamp the leg support 39 adjusted turned positions. rEhe body por ion 35 consists of a substantially vertical bar and the clamping collar is arranged at the upper end thereof While the lateral extensions project from the lower end of the bar. The concave bearing surfaces il are located at opposite sides of the body atthe outer terminals of the lateral extensions which are provided atopposite sides of each concave bearing surface with parallel flanges which guide the bearing members'of the leg supports 39 and hold the bearing members against transverse rotary movement so that the bearing members have simply a. sliding movement in a single plane. This leg support carries a footy rest 47, movable toward andy from the seat to adjusted posit-ions in which it is releasably held as by its pin 48 adapted to be inserted into any one of a series of holes 49, such series. extend-4 ing in the longitudinal direction of support 39. rlhe seat l may be mounted turnably in a horizontal plane on its upright support 5.0 as shown in Figure 8.

Although the arms 24 may turn freely and not limitedly as shown in Figure 4f, their handles 25 may be pressed toward each other sufficiently to compress thel springs 20 completely against the stop 2G, whereupon the swinging movement of these arms 24 thus held together will swing the arm member 16 although the same be not keyed as hereinbefore set forth.

This application is divisional from our pending application Ser. No.` 203,496, filed July 5, 1927, in which features are claimed that are not claimed in this application.

The invention being intended to be pointed out in the claim, is not to be limited to or by details of construction of any particular embodiment thereof illustrated by the dra-Wings or hereinbefore described.

What is claimed is:

In a structure of the character described, a leg rest comprising a body portion consisting of a substantially vertical bar provided at, the top with a clamping collar to slide on a standard and having lateral extensions at the lower end provided with upper concave bearing faces located at the outer terminals of the extensions, parallel guide flanges located at opposite sides of the bearing faces and carried by the said extensions, leg supports having bearing members provided with lower conven` bearing surfaces litting the said concave bearing surfaces and provided with longitudinal slots, said bearing members being slidable between and guided by said parallelflanges and held by the same against rotary movement, and fastening devices extending through the slots and provided with means for clamping the bearing members in sliding adjustment.

in testimony Whereofvve have hereunto set our hands at Grand 1l-apids, Michigan, this lith day of November, i927.

@EGB-GE H. HAMILTON.

A. TWHITE.

lll 0 

